Endogenous hormonal and enzymatic responses of Catharanthus roseus with triadimefon application under water deficits.
The effect of triadimefon was investigated in a medicinal plant, Catharanthus roseus subjected to water deficit stress. The abscisic acid (ABA) level, DNA and RNA contents and activities of ATPase and protease were found varying in different parts of the plants under treatment. Drought treatment increased the ABA level more than twofold in all parts of the plants. TDM treatment to the drought stressed plants showed highest contents. In roots, stem and leaves, drought stress caused a decrease in the DNA and RNA contents when compared with control and other treatments. TDM treatment with drought increased the nucleic acid contents to the level of the control roots. The activity of ATPase and protease were increased under drought treatment and lowered due to TDM applications. This information could be useful in the field of soil water deficits reclamation efforts by using plant growth regulators.
Jaleel
Cheruth Abdul
CA
Stress Physiology Lab, Department of Botany, Annamalai University, Annamalainagar, Tamil Nadu, India. abdul79jaleel@yahoo.co.in
Gopi
Ragupathi
R
Manivannan
Paramasivam
P
Gomathinayagam
Muthiah
M
Hong-Bo
Shao
S
Zhao
Chang-Xing
CX
Panneerselvam
Rajaram
R
D000040:Abscisic Acid / Q000378:metabolism; D000251:Adenosine Triphosphatases / Q000378:metabolism; D030008:Catharanthus / Q000187:drug effects / Q000254:growth & development / Q000502:physiology*; D018744:DNA, Plant / Q000187:drug effects / Q000378:metabolism; D055864:Droughts; D005659:Fungicides, Industrial / Q000494:pharmacology*; D010447:Peptide Hydrolases / Q000378:metabolism; D010940:Plant Proteins / Q000187:drug effects / Q000378:metabolism; D018749:RNA, Plant / Q000187:drug effects / Q000378:metabolism; D012639:Seeds / Q000187:drug effects / Q000502:physiology; D014230:Triazoles / Q000494:pharmacology*
D018744:DNA, Plant; D005659:Fungicides, Industrial; D010940:Plant Proteins; D018749:RNA, Plant; D014230:Triazoles; C032910:triadimefon; D000040:Abscisic Acid; D010447:Peptide Hydrolases; D000251:Adenosine Triphosphatases